Abstract
Many states now require law enforcement to collect race data on traffic stops, but there has been little research on the use of that data to inform public policy or reform efforts at the agency level. This article addresses that lacuna by presenting results from the first statewide analysis of Vermont traffic stop data. Racial threat theory, a subset of stratification theory, would predict that policing in a predominantly white state like Vermont would exhibit lower racial disparities than states with a more racially diverse population because the “threat” to white dominance is less. The results contradict that prediction. Vermont, despite its reputation as a liberal state, is not different from other states in exhibiting wide racial disparities in policing. And yet, analysis and dissemination of race data in policing, by providing an evidentiary basis for citizen claims of racial bias, contributed to action on the part of the state legislature and government to address racial discrimination not only in policing but also in the broader criminal justice system. We report on those reform efforts and on the actions taken by three reform-minded law enforcement agencies to reduce and eliminate unjustifiable racial disparities in policing.
Introduction
Vermont is perceived by many to be a political outlier in the United States. It was the first state to outlaw slavery in 1777. And in more recent history, Vermont was one of the first states to legalize civil unions, to push (unsuccessfully) for a single payer health care system, and to nominate a transgender gubernatorial candidate. Owing to its progressive reputation, Vermont has also been perceived as a state with considerably less racial bias toward blacks and Hispanics than is evident in other parts of the country. This assumption is challenged, however, by the first statewide analysis of traffic stop data that reveal notable black–white and Hispanic-white disparities—larger than in a number of more racially heterogeneous states.
As traffic policing is one of the most common circumstances under which members of the public interact with police officers, the data generated from stops yield a large database that can provide a window into racial disparities in the broader criminal justice system on which data may not exist or be harder to collect. Traffic data then can serve as a “canary in the coal mine,” alerting agencies and the public to differential racial treatment in policing that spills over into other components of the criminal justice system.
In Vermont, data analysis has proven to be a fulcrum for reform, not only in policing but also in other domains of the criminal justice system. Although these efforts are in their early stages, they point to the efficacy of data collection and analysis for incentivizing reform efforts by providing evidence. This article details the background leading to the statewide law requiring that all law enforcement agencies collect race data, the results of a statewide data analysis of traffic stops, and the subsequent reform efforts at the level of the legislature and government as well as by law enforcement agencies themselves. We also reflect on the resistance of some law enforcement agencies and the problem of the lack of robust structures of accountability for law enforcement.
Literature Review
Police surveillance that targets people of color and in particular, African Americans, is not new. Racial profiling has been characterized as a form of social control used by law enforcement to maintain a racially hierarchical social order since the time of chattel slavery (Blalock, 1967; Blumer, 1958; Stucky, 2011). With regard to traffic stops, as early as the 1930s, the NAACP began receiving complaints from black drivers about distressing traffic stops for minor or false charges (Seo, 2019). During the War on Drugs that began in the 1980s, traffic policing took on a new and important role in racializing policing. The “drug courier” profile, created by the Drug Enforcement Agency (DEA), outlined what were perceived to be common characteristics of drug couriers. This profile was used in highway traffic stops with a goal of interdicting drug trafficking along the I-95 corridor. Pretextual stops—stops based on minor violations of the letter of the law as a pretext for stopping a motorist an officer may want to investigate for other reasons—were legitimized in Whren v. United States. The DEA subsequently provided training to police officers in using pretextual stops in traffic policing (Hinton, 2016). Claims of racial profiling led to lawsuits, however, causing a number of states to take action to address these inequities (Myers, 2002).
North Carolina was one of the first states to mandate race data collection in traffic stops with a goal of robustly answering the question of whether drivers of color were treated differently than white drivers (Baumgartner et al., 2018), and a number of other states followed suit. Extensive data on race and traffic policing are now available at the state and local level. 1 In the first U.S. study of its kind, Pierson et al. (2020) undertook the task of analyzing multistate data, based on 95 million traffic stops by 21 state patrol and 35 municipal agencies. The authors find that black and Hispanic drivers are stopped and searched at higher rates than white drivers, a result that is consistent with that reported in public policy analyses and in numerous academic articles using city and state data. 2
Agencies differ in racial disparities in policing, however, and a key question to be answered is what might cause variation in racial disparities. Close and Mason (2015), reporting on Florida State Highway Patrol data, find evidence that search rates are linked to the racial composition of law enforcement agencies. They found that troopers, regardless of race, engage in fewer vehicle searches when assigned to barracks with a larger share of black and Hispanic troopers, and this contributes to more efficient searches (higher and more racially similar hit rates). Anwar and Fang’s (2006) analysis of the same data set show that white troopers have higher black–white and Hispanic-white search rate disparities than troopers of color. The racial composition of law enforcement agencies is thus a factor in influencing the culture and climate of agencies. In Vermont, where officers are primarily white, we might expect larger disparities.
Racial threat theory (or more generally, stratification theory) argues that policing acts as social control to maintain the disparate power and privileged position of the dominant racial group (in this case, people who identify as white). 3 It is hypothesized that “threat” (and therefore policing disparities) will intensify, the larger the share of blacks and Latinx relative to whites. This leads to the inference that the higher the share of black and Latinx in the population, the wider the racial disparities in policing. Following the logic of racial threat theory, when people of color are a small minority of the population (such as in Vermont), the perception of threat is likely to be lower and thus we would expect to see fewer racial disparities in policing. This hypothesis had been difficult to test until now because so few of the predominantly white states in the United States require the collection of traffic stop data.
The growing availability of traffic stop data around the country showing racial disparities has not been a panacea for policing reform. Several problems have plagued the usefulness of traffic stop data for reform efforts. One issue is that collecting data does not ensure that the data are analyzed in an unbiased manner. Another is that law enforcement agencies have challenged the validity of the data or have simply refused to acknowledge the findings. The most frequently criticized metric is racial stop rates, attributable to the benchmarking problem. Agencies often dispute the reliability of estimates of the driving population, for example, which are based on U.S. Census estimates of racial shares of the population (Engel & Calnon, 2004). Furthermore, in response to racial differences in arrest and search rates, law enforcement typically argues that the data simply prove that black and Latinx drivers exhibit a higher degree of criminality.
Local cultural and other contextual factors are also likely to determine the effectiveness of traffic stop data to stimulate reform. One element may be the power of communities of color to leverage change. In a North Carolina study, the authors developed a measure of black political power to serve as a variable to explain racial differences in traffic stop outcomes (Baumgartner et al., 2018). Using factor analysis on three variables—black population share, black share of voting population, and percentage of the local elected government that is black—the authors construct a latent variable to measure black political power in North Carolina’s cities and towns. They find, as hypothesized, that higher levels of black political power are associated with smaller racial disparities in the probability of a driver being searched. The inference is that higher levels of black political power have a positive effect on law enforcement’s willingness to institute effective reforms that reduce racial disparities. These findings suggest that data on racial disparities in policing alone are not enough to instigate reforms. Furthermore, one might conclude that reforms to address racial bias in policing are less likely to occur in states with small shares of blacks and other groups of color in political representation. And yet, events since 2016 in Vermont, an overwhelmingly white state, have contradicted that prediction.
Background
In 2007, a prominent African American resident of Vermont’s largest and most diverse city, Burlington, 4 submitted an op-ed to a local newspaper, describing an incident of “driving while black,” arguing that racial profiling was an epidemic in Vermont (Colston, 2007). Burlington’s then police chief contacted the author of the op-ed, inviting him to meet to discuss the issue of racial profiling. Their meeting led to the formation of Uncommon Alliance, a group comprised of members of the community of color and area police chiefs. This grass roots organization served as a forum to bring local law enforcement officials and the community together in a collaborative effort to build public trust and police accountability through ongoing dialogue with a goal of addressing racial disparities in policing and the criminal justice system.
After months of meetings in which community members described their experiences of racial profiling, it became clear that anecdotes were not sufficient to convince law enforcement of their racially disparate treatment of people of color. As a result, although there was at that time no legal requirement for law enforcement agencies to collect race data in traffic stops, the five participating agencies agreed to do so voluntarily. 5 Analysis of data for 2009 to 2010 identified notable racial disparities, results that were consistent with the concerns raised by the community of color (Seguino et al., 2012).
The Vermont legislature subsequently enacted 20 V.S.A. § 2366 in 2013, a bill requiring all law enforcement agencies to (a) adopt a fair and impartial policing (FIP) policy and (b) collect race data on traffic stops beginning in September 2014 and to make those data publicly available. The authors conducted the first statewide analysis of racial disparities in traffic policing using that data, and results are discussed in detail in the next section.
Statewide Racial Disparities in Traffic Policing
The data set used to carry out the statewide traffic data analysis was compiled by the authors in response to data requests made to individual agencies. Not all agencies were compliant with the legislation. Nevertheless, by 2016, the largest agencies, covering roughly 78% of Vermont’s population, reported their data. 6 Among the agencies that did report their data, some collected only a few of the required categories of data, and in cases where essential data were missing, results from these agencies could not be included. 7
We examined outcomes for the entire state, using data for 2015, because that is the only year for which we have complete data from all 29 agencies that complied. In addition, we evaluated results for each agency separately using data for all years available, and these data span 2011 to 2016. The primary goal was to identify patterns in the data, based on an analysis of several indicators, for evidence of racial disparities that could be indicative of bias: (a) racial shares of stops compared to racial shares of the driving population; (b) racial differences in citations versus warnings, (c) racial differences in arrest rates; (d) search rates by race; and (e) the percentage of searches that yield contraband. We report the results for all indicators, 8 but our main focus is on search rates by race as compared to the percentage of searches that result in contraband being found by race. This comparison offers a means to test for racial bias in policing (Persico & Todd, 2008).
Racial Disparities in Stop Rates
The driver’s race recorded in traffic stop incident reports is based on officer perception. In recording the perceived race of the driver, officers choose among the following categories: white, black, Asian, Hispanic, and Native American. 9 To calculate racial disparities in stops, racial shares of traffic stops are computed and compared to the corresponding racial shares of the population. We use two sources of estimates of the racial shares of the driving population: (a) American Community Survey (ACS) population data from the U.S. Census Bureau and (b) Vermont Department of Motor Vehicle (DMV) data on race of not-at-fault drivers from accident reports. 10 Each of these data sources has weaknesses and strengths. While the ACS population estimates are based on a sound sampling methodology, they do not capture the driving population. In contrast, the DMV data have the potential to provide a reasonable estimate of racial shares of the driving population, but a weakness is that race of not-at-fault drivers is missing in 37% of officers’ accident reports from 2011 to 2016.
Table 1 reports total stops where the officer recorded the driver’s perceived race, racial shares of stops, and racial shares of the population and not-at-fault accidents in 2015 for all agencies combined. That table also reports statewide racial disparity indices (the racial share of stops divided by the racial share of the driving population), calculated using both estimates of the driving population. A disparity index with a value of 1.0 indicates that a group is stopped at a rate that is equal to its share of the population—and thus indicates no disparity. An index that is less than 1.0 indicates a group is stopped at a rate that is lower than its share of the population, and conversely, an index greater than 1.0 indicates a group is stopped at a rate higher than expected, given its share of the population.
Racial Shares of Police Stops and Population in Vermont, 2015.
Note. Total stops = 107,497. NA is not available. For Hispanic drivers, we only provide the share of stops and accidents, but not the population share because the ACS and Vermont police do not use comparable methods of classifying drivers as Hispanic. The share of accidents is for not-at-fault drivers from the DMV. ACS = American Community Survey; DMV = Department of Motor Vehicle.
The data in Table 1 show that white and Asian shares of stopped drivers are less than their estimated shares of the driving population. For example, white drivers comprise 94.4% of all stopped drivers, whereas the point estimate of their share of the driving population is 95.1% using the ACS and 95.4% using the DMV not-at-fault accident data. In contrast, black and Hispanic drivers are over-stopped as compared to their share of the population, with disparity indices that range from 1.61 to 1.93. 11
Figure 1 shows stop data by agency for black and Asian drivers as compared to the county share of the population. 12 The bold horizontal line in the figure represents parity—that is, it indicates that the black (Asian) share of stops is equal to the black (Asian) share of the driving population. The agencies are ranked from highest disparity to lowest, left to right. We use county data as our measure of the driving population for several reasons. First, driving populations are more transient across city/town lines than county. Second, ACS sample sizes for some towns are too small for reliable population estimates.

Likelihood of a traffic stop compared to share of population by race.
Panel A provides data on the black share of stopped drivers compared to the county driving population. 13 In all but a few towns, the black share of stops exceeds the estimated black share of the driving population. At the extreme is Vergennes, where black drivers are stopped at a rate that is almost three times their estimated share of the county population. The data indicate that traffic police tend to treat Asian drivers more favorably than black drivers (Panel B, Figure 1). The likelihood of Asian drivers being stopped is below their population share in all but a few agencies.
Post-stop Outcomes
Police officers frequently assert they do not know the race of a driver before a stop. But once a driver has been stopped, law enforcement officers are in a position to form a perception of the driver’s race. For this reason and due to concerns about the precision of estimated racial shares of the driving population (the so-called benchmarking problem), post-stop outcomes are of significant interest. Table 2 summarizes post-stop outcomes for 2015 for all agencies in the state. An * identifies the rates for black, Asian, or Hispanic drivers that are statistically different from the rates calculated for white drivers (with a z-score greater than 2).
Post-Stop Outcomes, 2015 (All Agencies).
Note. These data are for externally generated stops only. Discretionary searches refer to those that the officer has the sole discretion to initiate. Searches based on a warrant require a judge’s approval and are not included here. Asterisks indicate statistically significant differences in Black, Asian, and Hispanic outcomes relative to white outcomes.
One way to evaluate racial differences in post-stop outcomes is to compare the percentage of drivers receiving a citation (ticket) versus a warning. Black and Hispanic drivers are more likely to receive tickets than white drivers (see Table 2). With regard to arrest rate disparities, black drivers in Vermont are more likely to be arrested after a stop than any other racial/ethnic group (2.1% of black drivers were arrested subsequent to a stop, compared to 1.2% of white drivers in 2015). As the emphasis in race data analysis is on officer discretion, arrest rate disparities, while of interest, are opaque insofar as agency policies may play a strong role in determining who is arrested. 14
Of particular interest in assessing racial disparities in policing are search rates and the percentage of searches that result in contraband being found, hereafter referred to as the “hit rate.” Police reports provide data on searches based on three criteria: (a) probable cause, (b) reasonable suspicion (a lower bar of evidence than probable cause), and (c) warrants. A search based on a warrant typically results from an instance in which an officer requests but does not obtain consent from the driver to conduct a search, then impounding the vehicle and seeking a warrant from a judge. 15 We focus here on discretionary searches although the inclusion of searches based on a warrant would not substantially alter our results.
Black and Hispanic search rates are notably higher than the white search rate (3.6% and 2.6%, respectively, compared to 0.9% for white drivers). The Asian search rate is lower than that of any other racial/ethnic group at 0.5%. Critical race theory highlights the disparate status in the United States of non-white racial/ethnic groups with Asians typically considered “honorary” whites and a model minority. Search rate disparities between black and Hispanic drivers on one hand, and Asian drivers on the other hand, are consistent with this characterization, with Vermont law enforcement searching black and Hispanic drivers at 7.0 and 5.2 times the Asian search rate, respectively.
Figure 2 presents data on the ratio of black/white search rates for the three counties with data complete enough to include in our analysis for 2015 and the four largest Vermont law enforcement agencies—Burlington, Rutland, Vermont State Police (VSP), and Williston. The racial differences in search rates are statistically significant with z-scores greater than three in all cases. The agency with the greatest disparity is Rutland City, where black drivers are searched at a rate that is more than six times that of white drivers (5.5% of stopped drivers who were black were searched but less than 1.0% of stopped white drivers were searched). With the exception of VSP, there were too few searches of Asians and Hispanics to report those search rates at either the county or the municipal level. 16

Black/white search rate ratios by county and agency, 2015.
Racial disparities in searches do not in and of themselves prove racial bias. The probability a particular racial group is carrying contraband may be higher than other racial groups, thus justifying a higher search rate for that group. Therefore, a comparison of hit rates across racial groups is a means to identify potential racial bias in searching. This forms the basis of the hit rate test, premised on rational choice theory (Persico & Todd, 2008). The logic of this test is as follows. Searches are costly in terms of time and resources. Absent bias, police can be expected to choose and revise search strategies to maximize successful searches—that is, searches that yield contraband. If searches of one racial group result in a lower hit rate than another racial group, the optimizing officer would adjust her search strategy (by raising the threshold of evidence required to trigger a search) to minimize unproductive searches, such that hit rates across racial groups are equal. If, however, racial bias influences the decision to search (if, for example, officers have a lower threshold of evidence for one group of drivers as compared to another), the hit rate for minority drivers (e.g., black or Hispanic drivers) would be lower than for white drivers. Another way to view this is that minority hit rates that are lower than white hit rates are an indication that police may be over-searching minority drivers because they rely on a lower threshold of evidence to trigger a search.
A complexity of using the hit rate is that contraband varies in severity. In Vermont, weapons are not contraband, but a pack of cigarettes in the vehicle of a 16 year old is, for example. Ideally, then we would want to be able to control for the severity of the contraband found, and place greater weight on more severe infractions (such as possession of illegal quantities of drugs). 17 Vermont data only indicate whether contraband was found or not, but offer no information on the nature or quantity of the contraband found. To get at this, we examined hit rates in three ways. We calculated hit rates for all outcomes, for only those cases where a ticket was issued or the driver was arrested (or both), and for arrests only. An arrest subsequent to a search is consistent with contraband that is of a more serious nature or quantity.
Hit rates are lowest for blacks and Hispanics, the two racial/ethnic groups with the highest search rates (see Table 2). Asians have the highest hit rate (88.9%), the group least likely to be searched. In cases that result in a ticket and/or an arrest, the white hit rate is 67.0%, compared to 56.1% and 60.7% for black and Hispanic searched drivers, respectively. The only statistically significant difference in hit rates is between white and black drivers in cases where the outcome is a ticket and/or arrest. Thus, searched drivers who are black are less likely to be found with contraband that results in a ticket or arrest. When warnings and tickets are excluded, the white hit rate falls to 15% and the black hit rate falls to 12%, again lower than the white rate, but not statistically significant at the state level.
Only four agencies have enough hit rate data on which to base statistical inferences—Burlington, Rutland, VSP, and Williston (Figure 3). 18 In all cases, white hit rates exceed those of black drivers. All white–black differences in hit rates are statistically significant with z-scores that exceed 2.0 with the exception of Williston. That said, Williston’s white–black hit rate differences for all outcomes as well as arrests only are both statistically significant. 19 The hit rate test results are consistent with a hypothesis of racially biased policing whereby these law enforcement agencies rely on a lower threshold of evidence to initiate a search of the driver’s vehicle.

Hit rates resulting in ticket and/or arrest for four agencies.
Figure 4 compares Vermont black/white search and hit rate ratios to those of other states and cities in the United States. 20 We use Vermont statewide data as well as agency-level data for those agencies with sample sizes large enough on which to base inferences. Vermont’s racial disparities in search and hit rates, whether viewed at the statewide level or by agency, are notably higher than in other parts of the country that are more racially/ethnically diverse, including North Carolina, Missouri, and Kentucky. It is noteworthy that black/white search rate ratios in all agencies represented (Figure 4, Panel A) exceed 1, indicative of over-searching of black drivers relative to white drivers and/or under-searching of white drivers. Vermont agencies rank in the top 25% of those with the widest black–white search rate disparities.

Comparison of black/white search and hit rate ratios, selected cities and states: Panel A: black/white search rate ratios and Panel B: black/white hit rate ratios.
Panel B in Figure 4 compares Vermont black/white hit rate ratios to those in other cities and states. Ratios below 1 are indicative of anti-black bias in searches, given that a smaller proportion of black drivers compared to white drivers were found with contraband. As items that count as contraband differ across states and because of the diluting effect of counting low-level infractions that lead to a warning, comparisons of hit rates across agencies should be viewed with some caution. Nevertheless, as can be seen, two of the four Vermont agencies with a large enough sample size have among the lowest black/white hit rate ratios of all agencies in this group.
Each of the indicators in this statewide Vermont race data analysis reveal racial disparities among black and Hispanic drivers in Vermont relative to whites, and viewed together, mutually reinforce the conclusion that these disparities are not due to chance. They are consistent with a claim of systemic racial bias in the manner in which Vermont police officers stop and treat citizens subsequent to stop.
Do Racial Disparities in Search and Hit Rates Disappear When We Control for Context?
It is reasonable to question whether context can explain racial disparities in search and hit rates in Vermont. Some driving behaviors and circumstances may co-vary with race, resulting in inaccurately attributing disparities in outcomes to race when in fact they are due to other factors. If, even after controlling for factors like gender, age, reason for stop, and time of day, race is found to be a statistically significant predictor of a search and the likelihood that contraband is found, this reinforces the evidence that the race of the driver, independent of other factors, influences traffic policing in Vermont.
Probability of search methodology
Multivariate logistic regression analysis assesses the differential probability of black, Asian, Hispanic, and Native American drivers being searched as compared to white drivers. The full model takes this general form:
Dummy variables for each racial group are included, with white the excluded category. In our model, the coefficients for each of the driver race variables can be interpreted as the odds of a search for a driver of that race as compared to the odds for white drivers with the same other characteristics. An odds ratio that is greater than one indicates a group is more likely to be searched than the omitted (or benchmark) group. Finally, an odds ratio that is less than 1 is indicative of a lower probability of a group being searched relative to the omitted group. We estimate this model using all years of data available to us and for 2015 only. 21 Summary statistics for all years and 2015 only are in the appendix.
The coefficient on driver age reflects the increased (decreased) probability of being searched as age of driver rises. Similarly, the coefficient on Male indicates the odds male drivers will be searched compared to that of women drivers. The coefficients on the Reason for Stop variables indicate the odds of being searched for each reason for a stop as compared to odds of being searched due to moving violations (the omitted category) where the reason may be one of the following: investigatory stop, suspicion of driving while under the influence (DWI), vehicle equipment, and for reasons unknown (that is, the reason was not stipulated in the incident report). 22 We also control for the day of the week and the time of day, with the excluded categories respectively, Friday and afternoon. Controlling for all of these factors allows us to interpret the race variable, net of the impact of these other control variables. 23
Results are shown in Table 3. Starting with the basic model for all years (Model 1) in which race of the driver is the only explanatory variable, black drivers are four times more likely to be searched than white drivers. In contrast, Asian drivers are a little more than half as likely to be searched as white drivers. Native Americans are almost three times more likely to be searched and Hispanic drivers 3.5 times more likely to be searched.
Probability of a Search, All Years and 2015 Only.
Note. Standard errors are in parentheses. DWI = driving while under the influence.
p < .10. **p < .05. ***p < .01.
Model 2 adds gender and age of driver, time of day, and day of week. Since not all agencies report these variables, the number of observations decreases from roughly 409,000 to about 367,000. The odds ratio on age is below 1.0, indicating that that the older the driver, the lower the probability of being searched. The odds ratio on the gender of the driver indicates that the odds for male drivers are more than twice the odds for female drivers to be searched. The time of day results show that the probability of being searched is lower in the morning than in the afternoon and greater at night than in the afternoon. The addition of these controls reduces the odds ratio of black drivers being searched compared to white drives to 3.21, although care should be taken in comparing the results of the two regressions because some of these controls, such as time of day and type of stop, may be correlated with biased policing. For Hispanic drivers, the odds ratio also falls marginally to 3.022.
Models 3 and 4 repeat the analysis but limits the sample to data for 2015 only, the year for which we have full data from all agencies. In Model 3, where we control only for race, the odds of being searched for black drivers is 3.871 times greater than for white drivers. Asian driver odds of being searched relative to white drivers are slightly more than one half (they are half as likely to be searched, that is). And the odds for Hispanic drivers are 2.95 times greater than the odds for white drivers. Model 4 includes all control variables. The odds ratio of a black driver being searched falls slightly but is still high at 2.651. The odds of Asian drivers being searched compared to white drivers also falls to 0.310 with the added controls, while the odds ratio of a Hispanic driver being searched relative to a white driver falls to 2.493. 24
Taken together, this evidence suggests that racial disparities in search rates are extremely robust at the state level, regardless of the contextual factors controlled for. The use of more rigorous statistical techniques does not in any meaningful way change the nature of the descriptive data analysis in the section “Post-Stop Outcomes.”
The probability of finding contraband
We conduct logistic regression analysis to assess the role of race in the probability of finding contraband, subsequent to a search. As in the analysis of search rates, we control for other factors that may influence the probability of contraband being found to avoid erroneously attributing to race the effect of other factors. Again, we exclude externally generated stops and searches based on a warrant. The equation we estimate is as follows:
Table 4 reports the results of the probability of contraband found for searches for all outcomes of a search (warning, citation, and/or arrest) and for hits that result in citation and/or arrest only for all years for which we have data. The results shown for Model 1, where the only explanatory variable is race of the driver and includes all outcomes, indicate that the odds ratio for black and Hispanic drivers to be found with contraband subsequent to a search are half the odds ratio for a white driver. The difference in the probability of Asian drivers being found with contraband compared to white drivers is not statistically significant. The addition of controls in Model 2 does not in any meaningful way alter the odds ratios of finding contraband in searches of black, Asian, and Hispanic as compared to white drivers.
Probability of Contraband, All Outcomes, and Tickets/Arrests Only, All Years.
Note. Standard errors are in parentheses. DWI = driving while under the influence.
p < .10. **p < .05. ***p < .01.
We re-ran the regressions, focusing on contraband that resulted in issuance of a citation or in an arrest. (Minor cases of contraband, such as an open container or a juvenile in possession of cigarettes, were coded as no contraband). The results (Models 3 and 4) indicate that by recoding warnings as no contraband, the probability of black and Hispanic drivers being found with contraband relative to white drivers is marginally higher than when all types of contraband are included, but still well below parity.
To sum up the results of the logistic regressions, adding controls for a variety of contextual factors has little effect on racial disparities in the probability of being searched and of contraband being found during a search. Controlling for a variety of factors, race continues to be a statistically significant factor in an officer’s decision to search a vehicle. Moreover, and with regard to the question of racial bias as an explanation for such disparities, we find that black and Hispanic drivers are less likely to be found with contraband even after controlling for contextual factors, a finding that is consistent with over-searching of those groups (and/or under-searching of white drivers).
Reforms to Address Bias in Policing
This data and analysis representing the first statewide analysis of racial disparities in Vermont traffic stop policing drew significant public attention to the problem of racial inequality and discrimination in Vermont with an impact on legislation and policing. 25 To assess this impact, we reviewed Vermont legislation designed to addresses racial bias in state government and the criminal justice system enacted over the last several years. We also conducted interviews with the three Vermont law enforcement agencies noted for their voluntary reform efforts in this area.
Legislative Actions
Following the start of voluntary race data collection in Chittenden County in 2009 and the subsequent analyses conducted by the authors, the Vermont legislature adopted several race bills to promote bias-free policing and to address racial bias in other institutions. Apart from the 2013 bill requiring all law enforcement agencies to collect and make publicly available race data on all traffic stops, bills enacted fall into four categories: (a) FIP policies, (b) criminal justice reform, (c) systemic racism in state government, and (d) ethnic studies curriculum in K-12 education in Vermont.
FIP policies
Our findings on racial disparities in Vermont traffic policing combined with evidence on disparities in incarceration and increased national attention resulting from police videos of excessive use of force contributed to growing attention to racial bias in Vermont policing (Nellis, 2018). The 2015 detention of a Mexican citizen who was a passenger in a vehicle pulled over for a routine traffic stop was also a factor in legislative action. 26 Over the period 2012 to 2017, the legislature passed a series of modifications to a bill requiring the Criminal Justice Research Council to develop a model FIP policy that individual agencies are now required to adopt. 27 The FIP policy is designed to protect Vermonters from biased policing based on personal characteristics (such as race, gender, or sexual orientation) or immigration status. In response to concerns about police treatment and targeting of migrant workers, this policy also limits local police from engaging in immigration enforcement.
Criminal justice reform
In 2017, the legislature passed Act 54. As part of that act, the Racial Disparities in the Criminal and Juvenile Justice System Advisory Panel was formed under the aegis of the Attorney General’s office (AGO) to provide recommendations to address racial disparities in the criminal and juvenile justice systems and to inform the continued work of the legislature on racial inequality. The panel’s work includes reviewing police data, 28 providing recommendations regarding training and best practices for law enforcement, judges, prosecutors, and defense attorneys; educating and engaging with the community; and producing a biennial report to the legislature. 29
Systemic racism in state government
It became clear to legislators, as a result of consultations with grassroots groups, the Vermont Human Rights Commission, and other stakeholders, that understanding and eliminating the disparities in the criminal and juvenile justice systems required looking at systemic racism in state government and in the private sector. As a result, Section 3 of Act 54 charged the AGO, in consultation with the Human Rights Commission, to develop a strategy to address racial disparities within the state systems of education (discussed below), labor and employment, access to housing and health care, and economic development. 30
The legislature also passed Act 9, creating a five-member Racial Equity Advisory Panel and a cabinet-level Executive Director of Racial Equity tasked with identifying and combating systemic racism in all levels of state government. 31 The executive director’s tasks include: (a) a comprehensive organizational review to identify systemic racism in all three branches of state government, (b) management and oversight of statewide collection of race-based data to determine the nature and scope of racial discrimination within state government systems, and (c) development of performance targets for the General Assembly, Judiciary, and state agencies in order to evaluate the effectiveness of reforms.
Ethnic studies in the curriculum
In addition to Seguino and Brooks (2017) which provided evidence of racial disparities in policing, a series of racially motivated events, such as the death threats received by Vermont’s lone black women legislator, led to a sense of legislative urgency. 32 Amid the bevy of legislation that had been proposed, an over-arching theme emerged: that in addition to collecting and analyzing data and changing policies, addressing racial disparities and discrimination requires changes in the underlying culture of the state with regard to race. One of the main suggestions for accomplishing this was to educate children from a curriculum that fairly represents both the contributions of people of color, women, and people with disabilities, while representing the history of oppression of these groups.
In this spirit, the legislature in 2019 passed Act 1, which created the 20-person Ethnic and Social Equity Standards Advisory Working Group to advise the State Board of Education on the adoption of ethnic and social equity studies standards into statewide educational standards. 33 The bill also requires the Agency of Education (AOE) to collect and report data on student performance and hazing, harassment, or bullying incidents disaggregated by student groups, including ethnic and racial groups, poverty status, disability status, English language learner status, and gender. Here, as in other legislative actions, there is a strong emphasis on data collection and analysis to inform, monitor, and evaluate policy.
In all, the state created six new agencies and organizations 34 to address issues of racial inequality since 2017, adding to the four that had been created in the previous 18 years. The current legislative session, further, is taking up bills to ban chokeholds, mandate the use of body cameras, and expand the collection of traffic stop race data. Proposals to reduce the size of police departments have been advanced in several Vermont towns and cities. A bill to reduce the incarcerated population of Vermonters and invest the savings in strategies to improve public safety is also under consideration in response to the recommendations of the newly created attorney general’s panel on criminal justice reform.
Voluntary Law Enforcement Reforms 35
Among the 69 law enforcement agencies in Vermont, three of the largest—VSP, South Burlington Police Department (SBPD), and Brattleboro Police Department (BPD)—have enacted a variety of reforms to address racial disparities identified in the traffic stop data. In contrast, many other agencies have reacted negatively to data collection efforts, disputing the results of the data analysis.
The reform-minded agencies report reacting with “shock and awe” to the Seguino and Brooks (2017) study, which represented the first analysis of Vermont statewide traffic stop data. In contrast to the defensiveness of a majority of law enforcement agencies, the leadership of these reformers sent the message to their officers that despite what they may believe are imperfections in the data, the disparities they show are real and that it is the responsibility of law enforcement to use the data analysis as a guide to understand why racial disparities exist and to eliminate practices that leads to unjustifiable disparities. The reform efforts fall into four categories: (a) data, (b) accountability of personnel, (c) recruitment and hiring, (d) training, and (e) policies.
Data
Data reform efforts have been directed at the obligation of law enforcement agencies to produce more accurate data to improve the quality of the findings and to abide by the law. Two major problems existed in the data used by Seguino and Brooks (2017): large amounts of missing data in incident reports filed by officers, and a lack of consistency in how officers applied real-world events to data categories (for example, officers had differing interpretations of what constituted an investigatory stop).
Seguino and Brooks (2019) summarized the current data deficiencies, and recommended additional categories of data be collected on traffic stops as well as on use of force. We also proposed a new arrangement for managing data (shifting control from an outside vendor who managed the data to state oversight in the AGO) and holding law enforcement accountable for fulfilling their obligations with regard to data collection.
VSP developed a data collection and quality training module in 2017 in response to the authors’ earlier analyses of VSP traffic stop data. The training module was used to train troopers at 12 barracks throughout the state. The VSP training material is now also used by the Vermont Criminal Justice Training Council (VCJTC), which oversees training of new police recruits to Vermont’s Police Academy. Missing data have dramatically declined in VSP data reports in stark contrast to a number of the nonreformers, which continue to have problems of missing data and a failure to report data to the state in a timely manner. SBPD and BPD have also made strides in requiring complete incident reports, and thus reducing missing data.
Accountability of personnel
A defining characteristic of the three reform-minded agencies is their use of the traffic stop data to promote officer accountability. To varying degrees, these agencies review traffic stop data periodically (in some cases, monthly) to keep track of officers’ stop, arrest, and search rates as compared to that of their peers. In the policing literature, this is called internal benchmarking. Supervisors engage those officers/troopers, whose data indicate they are outliers, in discussions about their policing practices, sending a message that the command staff is committed to eliminating unjustifiable disparities. VSP also has a tracking system for high-speed chases, use of force, and complaints against troopers. Officers accruing three of these events in a 6-month period are required to meet with their supervisors to review videos of traffic stops. This too helps spread by word of mouth that the agency is actively monitoring troopers to ensure FIP policies are adhered to. And finally, every member of VSP’s command staff must meet with the agency’s accountability panel to answer questions on how they are actively supporting FIP policies.
BPD command staff review traffic stop data once a month, and randomly select officers for in-depth reviews. In the event of notable racial disparities, supervisors discuss with the officer her or his policing practices, and officers are required to articulate why disparities exist. That officer is then observed for the next 30 days to determine whether disparities are ongoing. In addition, once a quarter, the BPD staff randomly selects officers for scrutiny, contacting every 10th person the officers have had contact with for an assessment of the officer’s comportment. BPD differentiates itself from other law enforcement agencies in Vermont by evaluating officers on their performance on bias-free policing.
SBPD’s approach to using traffic stop data as an accountability tool differs from the other reform-minded agencies. Although individual officer data are not monitored, the leadership maintains a focus on the agency’s traffic stop data at roll call and in department-wide meetings. The goal is to keep the topic relevant without creating “anxiety” among officers. This approach is similar in effect to that of implicit bias training, which emphasizes the usefulness of in-the-moment reminders about the potential for racial bias as a way to make conscious those attitudes and biases that are unconscious.
Recruitment and hiring
Reform-minded agencies report that the traffic stop data analysis helped them recognize the need to diversify their workforces. Hiring is a multi-stage process that requires (sequentially) an application, Vermont Police Academy test, 36 an oral hiring panel interview, polygraph test, background investigation, and interview with command staff (typically the chief or commander).
The first step in diversifying is the generation of a diverse pool of candidates. Until recently, Vermont law enforcement agencies primarily advertised job vacancies on their own websites. Reform agencies now recruit outside of Vermont at job fairs at universities, including HBCUs, as well as military bases. Their regional focus is primarily the northeast. VSP as the biggest and best-endowed agency has three full-time recruiters (among which are two women including one of color). Outreach via social media has also expanded.
BPD’s police chief emphasizes the critical need for racial diversity among the ranks of officers and works jointly with the city of Brattleboro to recruit diverse candidates for all aspects of city government. As part of an annual city-wide recruitment event, students from nearby schools (including Massachusetts and New Hampshire) are invited to the city for a tour of the town, and visits to the police department (with opportunities for ride alongs), state’s attorney office, the Brattleboro Community Justice Center, among others. The goal is to generate a pipeline of applicants from diverse backgrounds. BPD also relies on the Community Equity Collaborative (CEC) for support in outreach for recruitment. 37 SBPD also has engaged the support of community members of color in the recruitment (and hiring) process to expand their outreach efforts.
Despite these efforts, BPD and SBPD have made little headway in recruiting and hiring a more diverse workforce. 38 In part, they argue, this is due to the lack of resources to recruit in cities with a more diverse population such as Syracuse or Buffalo in neighboring upstate New York. VSP has, however, made some progress in improving its applicant pool, with 2019 yielding 595 applications (for a target recruitment class of 20 troopers) of which 13% were women and 19% people of color. 39 VSP lacks trend data on applicant pools but sees the recent pool of applicants as improvement.
A major impediment to diversifying Vermont police agencies is the Vermont Police Academy exam, which applicants must pass to progress in the hiring process. According to VSP, roughly 50% of applicants of color fail to pass this exam. Concerns have been raised about potential bias of the test, and the VTJTC, the police academy’s governing body, has disseminated a request for proposals (RFPs) to review the exam and recommend changes.
The VSP has expanded the depth and breadth of background investigations to filter out candidates with problematic past associations with racially biased groups. In addition, the oral exam explores attitudes, requiring applicants to describe how they would behave in situations where bias has been found. As an example, recruits are asked to explain how they would respond to a call from a fearful store clerk late at night, reporting a vehicle with out-of-state plates driven by a lone black male. VSP differentiates itself as a reform agency in its willingness to allow vacancies to remain unfilled if there is an insufficient qualified applicant pool that demonstrates cultural sensitivity and awareness of racial bias issues. 40 This is especially noteworthy. given that many law enforcement agencies, including VSP, report difficulty in filling vacancies in recent years.
Training
The Vermont legislature has mandated at least 4 hours of antibias or FIP policy training for all law enforcement officers by December 2018, with training in odd-numbered years to remain certified. Trainings must be approved by the VCJTC, although there is no evidence that such trainings have occurred in other agencies or that the VCJTC is monitoring compliance. The reform agencies, however, voluntarily took up this work, even prior to the passage of the legislative bill on training.
VSP has instituted the most extensive training reforms relative to other agencies. In part, this can be explained by VSP’s size as the biggest and best-resourced agency in the state. VSP’s antibias training dates back to 2006 in response to a community survey in which 90% of people of color responded that they do not have confidence in the police. Our studies (especially Seguino & Brooks, 2014, 2015, 2017) and now their own follow-up data analyses demonstrating traffic stop disparities have fuelled VPS’s continued commitment to training as a means to address potential racial bias. 41
VSP focused first on training command staff, recognizing that for systemic change, leadership had to understand and support the direction the agency adopted in promoting FIP. In the second stage, trainings were developed for new recruits. Subsequent to 16 weeks of Vermont Police Academy training, new recruits now undergo an additional 9 weeks of VSP training, of which one day is cultural sensitivity training. This training, conducted jointly by VSP staff and community members of color, some of whom are professional trainers, includes exercises such as a viewing and discussion of Ava Duvernay’s Thirteenth and completion of the Implicit Association Test. The goal is to train recruits in understanding the impact of stereotypes and implicit bias on decision making. Given the extensive discretion troopers and officers possess in their work (such as whom to stop, issue a citation to, and search), implicit bias training is seen as essential to the training officers receive.
VSP is now expanding its training efforts to troopers that have been in service for 10 to 15 years. Informal leaders (but not supervisors) are the target group for specialized training, conducted in conjunction with community members with expertise on issues or race and bias. The work includes reading books on race and racial history and discussions of videos of recent national police events. And, each week, this group of 35 informal leaders (10% of VSP’s sworn troopers) is exposed to news stories of bias and policing (usually at informal lunchtime gatherings), with training on how events can be interpreted from differing perspectives. According to VSP, this develops troopers’ flexibility in their own thinking about scenarios they come upon in policing.
SBPD’s training protocol does not extend beyond the FIP online training that officers are required to take and pass, whereby officers read and are tested on the policy. The agency lacks the funding and expertise to mount its own implicit bias trainings, as do many of the smaller agencies in Vermont. SBPD’s police chief has noted that the most important trainings the agency would benefit from are on implicit bias, systemic racism, and U.S. racial history, arguing officers would be less defensive about the traffic data results and community criticism of racially biased policing if they had this background.
BPD, too, reports a lack of resources for in-depth trainings. It relies on city-wide antibias training, required of all department heads, and assistance from outside groups such as the Matthew Shepherd Foundation (for help on recognizing and responding to hate crimes) and area colleges. At the department level, there are now two trainings a year, focused on the agency’s progress in implementing its FIP policy.
Policies
The major policy reform among all law enforcement agencies has been the adoption of the FIP policy, although the impetus for this was a legislative bill in 2010, not the agencies themselves. For many agencies, the development of and training on FIP policies is merely a pro forma exercise in response to a legislative directive. The reform-minded agencies have, however, relied on their FIP policies to guide their agency’s work in reducing racial bias in policing and as part of a tool for self-reflection and evaluation of staff.
As noted, VSP trains extensively on FIP policy and has done so for some time. SBPD, in response to a renewed legislative emphasis on FIP, updated its own policy, and leadership has made this the focal point of communications with officers. Similarly, BPD in 2014 underwent a self-assessment in 2014 in every division of the agency, reviewing policies and practices to determine what the agency was doing and how it fit with their FIP policy related to bias-free policing. The process took place over a full year, reflecting the seriousness with which this effort was undertaken, and culminated in a change to BPDs bias-free policing mission statement from “boilerplate” to a more advanced statement. 42
Finally, all of the reform-minded agencies now emphasize to their officers that the purpose of traffic policing is public safety, not investigation of criminal activity. The traffic stop data caused agency leaders to recognize that traffic stops are not effective for drug interdiction, a task more effectively carried out by investigative units. This is particularly a consequential shift in attitude in Vermont where many police chiefs argue that disparate black–white and Hispanic–white search rates are in response to their belief that it is primarily blacks and Hispanics who are trafficking drugs into Vermont from Massachusetts, New York, and New Jersey.
This summary of reform efforts represents an aspiration of eliminating unjustifiable racial (and other) disparities. There is as yet no evidentiary basis to ascertain whether such steps have yielded results. In part, this is because it takes time for institutional reforms that are aimed at changing attitudes to have an impact. The analysis of race traffic stop data and the accompanying public attention are ultimately the instrument by which community members and law enforcement agencies will know whether reform efforts have yielded results.
Conclusion
Based on race data collected and analyzed on traffic stops in Vermont, there is evidence that black and Hispanic drivers face disparate treatment by police as compared to white and, in some cases, Asian drivers. This assessment is based on analysis of five traffic stop indicators: racial shares of traffic stops, and racial differences in rates of ticket versus warning rates, and arrest, search, and hits. Of particular note are search and hit rate disparities. Data indicate that at the state level, the search rates of black and Hispanic drivers are 4.0 and 2.9 times that of white drivers, respectively. According to the hit rate test, racial disparities in searches are consistent with racially biased policing, with black and Hispanic drivers less likely than white or Asian drivers to be found with contraband. These results are suggestive of preference-based discrimination on the part of traffic police.
Vermont racial disparities in policing are wider than in more racially heterogeneous states (Figure 4). In part, this may be explained by racial composition of Vermont’s law enforcement agencies, which is, like the state, overwhelmingly white. 43 These results contradict racial threat theory which suggests that the greater the presence of the racially subordinate group (black and Hispanics) in the population, the greater the perceived threat and the more likely policing will serve to restore the power and privilege of the dominant group (whites). It aligns, however, with the findings of Anwar and Fang (2006), who find that white troopers have the widest black–white and Hispanic–white search rate disparities.
While the numerical dominance in Vermont of those identified as white may help to explain racial disparities in policing, the vigorous response by the legislature—also predominantly white—is not as easily explained. Black political representation in Vermont is very low, with two African American representatives (out of 150) in the Vermont House, none in the Senate, and no black mayors or town managers. That the traffic data analysis had such a strong impact on legislative actions may in part be due to state’s progressive self-identity, although one cannot discount the role of 13 deaths at the hands of Vermont police since 2013. The recent Attorney General panel’s report to the legislature on criminal justice reform recommends, based in part on recommendations outlined in Seguino and Brooks (2019), a significant state investment in a robust criminal justice data system to address the current lack of reliable and comprehensive data. A recommendation to embark on a statewide effort to routinely collect and report on racial disparities in use of force data was also made. Furthermore, the degree to which legislative action has gone beyond policing to address systemic racial bias in state government and public education is noteworthy.
Reforms at the level of law enforcement agencies have been sparse, however. Many law enforcement agencies grudgingly complied with the requirement to collect race data in traffic policing and have failed to use the data in any meaningful way as a management tool. Indeed, some agencies fail to comply with the law, generating only partial data, if at all, and in many cases, of poor quality. Data are not made available on a timely basis, making it difficult for police leadership and communities to hold officers accountable for their policing practices. These failures to comply with the race data collection law highlight the problem of accountability at the agency level.
Only the VSP is governed and monitored by state government, reporting to the Commissioner of Public Safety. As the legislation requiring data collection provides no mechanism to ensure compliance, local law enforcement agencies are only accountable to their select boards or city councils, many of which lack the expertise or commitment to addressing racial bias. In contrast, states such as North Carolina address these compliance problems by making state grants to law enforcement agencies contingent on their compliance with traffic data submission requirements (Baumgartner et al., 2018).
Nevertheless, several Vermont reform-minded law enforcement agencies have responded to the challenge of addressing and eliminating racial bias in policing. They have taken different tacks, ranging from procedures and processes that evaluate employees—command staff, officers, and members of other units—on their bias-free policing performance to a “soft” approach that encourages behavioral changes but without consequences. Training in implicit bias, race history, and cultural competence has also been part of the toolkit of these agencies.
Although recent actions at the state and local level appear promising, the efficacy of these first steps at policing and criminal justice reform in Vermont can only be determined by data analysis. Legislative efforts are underway to implement strategies to improve the types and quality of data collected, as well as incentivize compliance with the law. With 5 years of traffic stop data now available, allowing for trend analysis (and importantly, large enough sample sizes on which to base inferences, especially for smaller municipalities), the state is in a position to monitor the effects of its efforts, as are reform-minded agencies. 44
Footnotes
Appendix
Data Summary, 2015 and All Years.
| Variables | White | Black | Asian | Hispanic | Native American |
|---|---|---|---|---|---|
| Panel A: 2015 | |||||
| Total stops | 101,443 | 3,146 | 1,743 | 1,082 | 83 |
| Warnings | 62,898 | 1,854 | 1,056 | 610 | 46 |
| Tickets | 37,963 | 1,276 | 675 | 456 | 33 |
| Arrests | 1,163 | 67 | 19 | 14 | 2 |
| Discretionary searches | 907 | 114 | 9 | 28 | 0 |
| Hits | 686 | 80 | 0 | 20 | 0 |
| Panel B: All years | |||||
| Total stops | 392,084 | 10,689 | 6,292 | 3,671 | 355 |
| Warnings | 4,477 | 6,272 | 3,746 | 2,000 | 180 |
| Tickets | 144,635 | 4,370 | 2,561 | 1,612 | 166 |
| Arrests | 243,504 | 219 | 49 | 55 | 8 |
| Discretionary searches | 3,835 | 421 | 36 | 122 | 10 |
| Hits | 2,949 | 265 | 28 | 79 | 6 |
Note. Data are for non-externally generated stops only.
Acknowledgements
The authors would like to thank Jianxiong Huang, Kyle Mitofsky, and Kathleen Manning for excellent data support, and to Alan McKinnon, Brock Gibian, Rayelle Washington, and Jennifer Nerby for their research assistance. They also thank Donald Tomascovic-Devey, South Burlington Police Chief Shawn Burke, Brattleboro Police Chief Michael Fitzgerald, and Vermont State Police Captain Garry Scott and Major Ingrid Jonas, for comments and input.
Declaration of Conflicting Interests
The authors declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.
Funding
The authors received no financial support for the research, authorship, and/or publication of this article.
